|
學年
|
112 |
|
學期
|
2 |
|
出版（發表）日期
|
2024-06-01 |
|
作品名稱
|
Stabilizing High-Ni Cathodes with Gradient Surface Ti-enrichment |
|
作品名稱（其他語言）
|
|
|
著者
|
Wenchang Zhu, Xiaotian Zhu, Jizhen Qi, Junyi Yao, Yanbin Shen, Guanjian Cheng, Xue Huang, Shiqi Yang, Hao Zhang, Chao-Lung Chiang, Yan-Gu Lin, Jianming Bai, Wanjian Yin, Lijun Gao, Liwei Chen, Feng Wang, Jianqing Zhao |
|
單位
|
|
|
出版者
|
|
|
著錄名稱、卷期、頁數
|
Chemical Engineering Journal, 489, 151208 |
|
摘要
|
High-Ni cathodes are being intensely pursued worldwide for electric vehicles and other energy-dense applications due to their high capacity and low cost. However, structural instabilities during electrochemical cycling and when subjected to thermal treatment have been the major issues hindering their practical deployment. We here report a rational design of coating-integrated-into-synthesis protocol for fabricating surface Ti-enriched LiNi0.8Mn0.1Co0.1O2 (NMC811#Ti) material. The coating to intermediates is crucial to obtain high structural ordering, both in the bulk and surface of high-Ni cathodes, and the Ti substitute has a unique tri-valence (Ti3+) in a gradient surface distribution. The simulations of projected density of states in the atomistic understanding further certify significantly enhanced stability of lattice oxygen for the NMC811 through such a Ti3+-based structure reinforcement. Consequently, the NMC811#Ti cathode delivers a high capacity up to 200 mAh g−1 at 0.1 C, along with superior stabilities during air-storage and thermal treatment (up to 297 °C at the fully charged state under differential scanning calorimetric measurements). The corresponding NMC811#Ti||graphite full cell exhibits a desired 83.6 % capacity retention after 1000 cycles at 0.5 C in a voltage range of 2.8–4.3 V. This work demonstrates a delicate surface reinforcement to stabilize high-Ni cathodes for long-life and safe lithium-ion batteries. |
|
關鍵字
|
Lithium-ion battery, High-Ni cathode, Surface Ti-enrichment, Cycling stability, Thermal stability |
|
語言
|
en |
|
ISSN
|
|
|
期刊性質
|
國外 |
|
收錄於
|
SCI
SSCI
Scopus
|
|
產學合作
|
|
|
通訊作者
|
Yanbin Shen, Lijun Gao, Jianqing Zhao |
|
審稿制度
|
是 |
|
國別
|
NLD |
|
公開徵稿
|
|
|
出版型式
|
,電子版 |